基于单片机的实时温度测控系统_毕业设计论文.doc

基于单片机的实时温度测控系统 摘 要 随着社会的进步和工业技术的发展，人们越来越重视温度因素，许多产品对温范围要求严格，而目前市场上普遍存在的温度检测仪器大都有温度信息传递不及时、精度不够的缺点，不利于工业控制者根据温度变化及时做出决定。在这样的形式下，开发一种实时性高、精度高的测量系统就很有必要。一种基于AT89C51单片机的温度测量及报警,该采用DS18B20作为温度监测元件，，显示，设置温度上下限。介绍了集成温度传感器DS18B20的原理，AT89C51单片机功能和应用着重给出了软硬件系统的各部分电路。该功能强大、结构简单。 本系统通过proteus仿真软件对系统进行仿真，基本功能已实现，参数满足设计要求。 关键词: ；；； Abstract With social progress and the development of industrial technology, there is a growing emphasis on the temperature factor, many products on strict temperature, temperature measurement instruments which currently prevails on the market tend to have do not deliver on time and temperature information disadvantages of imprecision, not conducive to industrial control based on temperature change in time to make a decision. In this situation, develop a real-time measuring system of high precision is very necessary. The design is based on the AT89C51 single-chip temperature measurement and alarm system, the system uses DS18B20 as the temperature acquisition, monitoring device, the collected signal is sent to the single chip processor, judging whether an alarm, and then the data is sent to the digital tube display, this design can be arbitrarily set temperature alarm limits. This paper introduces the principle of DS18B20 integrated temperature sensor, AT89C51 MCU function and application, especially given the hardware and software system of each part of circuit. The system has the advantages of novel, powerful, simple structure and small volume etc.. The system is simulated by proteus simulation software, the basic function has been achieved and the parameters meet the design requirements. Key Words:single chip; DS18B20; real-time temperature controller; sound and light alarm 目 录 第1章 绪 论 5 1.1 课题研究的背景及意义 5 1.2 国内外发展的现状 5 1.3 本文的主要工作 6 第2章 整体方案设计 7 2.1 方案选择 7 2.1.1 方案一 7 2.1.2 方案二 7 2.2 系统方案的设计 8 第3章 硬件电路的设计 9 3.1 单片机最小系统 9 3.1.1 AT89C51单片机的介绍 9 3.1.2 AT89C51的主要特性 9 3.1.3 AT89C51的引脚功能介绍 10 3.1.4 AT89C51系列单片机的功能单元 12 3.1.5 最小系统电路 15 3.2 测温电路设计 16 3.2.